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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Inventory Disclosure [Abstract]            
Finished goods $ 2,916   $ 2,608      
Raw materials and work in process 1,561   1,485      
Demonstration inventory 113   277      
Inventory, gross 4,590   4,370      
Allowance for obsolescence (559) (509) (511) (520) (520) (518)
Inventories, net $ 4,031   $ 3,859